Metal-bar-heating furnace



Aug. 5,1930. H. BANGERT 1,772,065

' METAL BAR HEATING FURNACE Filed Feb. 11, 1928 2 Sheets-Sheet l IN VENTOR.

ATTORNEY Aug. 5, 1930.

H. BANGERT METAL BAR HEATING FURNACE 2 Sheets-Sheet. 2

Filed Feb. 11, 1928 IN VEN TOR.

A TTORNE Y LLL from one bar to the other.

Patented Aug. 5, 1930 HEINRICH BANGERT, "or DUSSELDORF, 1 GERMANY fMETAL-BAR-HEATING FURNACE Application filed Februaryli, 1928, Serial No.

,My invention relates to improvements in furnaces for heating metal barsI and more particularly 1n furnaces of that type 1n wnlch bars aregradually advanced through the furnaces by means of a plungerfrom theintake end ofthe furnace and through-the same, the pressure. of theplunger being transmitted When thus heating bars of small diameter thesaid bars'are liable 'to be pushed oneabove the other, so that'a properoperation of the furnace is impossible; "in such cases it is necessaryto advance the bars hand. .Furtheufthe bars moving through the furnaceare in contact with one another, so that they are notuniformlyheatedpand it s necessary to leave the.

same within the furnace for uniformly heating the same.

, The object of the improveinents'is to proa long time for vide ameansby whichthe bars are passed through the furnace in the properrelative positions, and so "that the flame has access to thesidesthereof, and with this object view my invention consists in placingthe'bars onsuitable supports adapted to be pushed by the plunger throughthe furnace, success ve supports being in engagement with one another sothat the pressure of the plunger is transmitted from one support to theother,

and the supports being guided so that they are held in the properpositions.

In carrying out my invention I provide guide ways longitudinally of thefurnace, and I place on the said guide ways supporting rods adapted toslide in said guide ways and engaging one another with their end faces,the bars being placed on the said supporting rods transversely of theguide ways and at suitable distances apart. Thus the pressure of theplunger is transmitted through the supporting rods, and it does not acton the bars to be heated which are therefore held in the properpositions. o

For the purpose of explaining the invention a furnace and variousmethods of supporting the bars have been illustrated in the accompanyingdrawings in which the same letters of reference have been used in allthe views'to'indicate corresnonding parts. In

said drawings,

253,650, and in Germany February 28, 1927.

Fig. at is a sectional elevation taken on the line-HofFig.3,and f Fig.5is a partial plan view partly in section and taken on the line 5-5 ofFig 3and showing a modification of placing the bars ontheirsupportsw r I"f I Referring now to the 'example illustrated in Figs. land 2, thegeneral construction of the furnace is known in the art and I deeinitnot necessary to describe, the samedn detail. On the floorofthefurnacetwo 'guidew'ays. are provided which'as shown are in the form of railsformed in their top surface with guide channels for recesses, Below, thesaid. rails pipes 4; are'einbedded in thebrick work of the furnace, andtlie'fiaic'l pipes are con-- nected with a supply of cooling water. The

chan'nel'orfre cess of each rail ci is adapted to H The rodsarg'zidgtpted to be advanced by mean i of a' reciprocatlng'plunger (Z. nIn front of the 9 Tes PATE T -oFFl'-cE intake ende of thefurnacethere-is aftable I f which is adapted'to havepairsof support?ingrods c and a bar, or a bundle bars 0 placed thereon.

I n carrying out y inventionl ce ent suitable number of barsinto a bulllhthe bars belng held together by thin wireswound around. the ends ofthelbundlef'l place a pair of supporting rods 0 on 'thetable f, and Iplace the bundle b on the said rods. There after the plungercl isadvanced .for pushing I thesuppOrting rods 0 and the tenant carried'thereby into the furnace. .Thelrods 0' will now e'ngage withtheir endfacesitlie end faces oft-he supporting rods 0 which before havebeen-pushed into theffurnace, and 'the power" of the plunger is" thustransmitted through the supporting rodsctoall thefp ai'rsv of"supporting" rods-"which liave "before been pushed into'thefurnace'fwithbundles Z placed thereon. It appears therefore that thepressure of the plunger (Z does not act on the bundles b, and thattherefore the bundles remain in the proper relative positions. Further,the bundles arespaced from each other so that the heating gas has accessto the sides of the bundles and to the bottoms thereof. As the. seriesof supporting care ad; Vanced through the furnace, they successive-' 1yreach the hearth g. The rods are removed from the said hearth, -an-dthey; ape carried to;

the intake end of the furnace for repeated use. By circulatingcoolingwater;throughv the pipes 4 the rails a and the rod 0 are keptcool.

As shown, the floor of the furnace is preferably provlded withupstanding kerbs or ribs a providing agutter receiving; the skidrailsa'having in their upperfacesthe gu de, 1 channels in whichthesupport ng rods 0 slide;

T eopio ed. aces of theT- 'kidT di S ndi face ofth'e floor of thefurnace in the gutters are. recessed to provideconduitsto receivethecooling pipes 4t. By 'tl'ns construet on allthe.

parts are adaptedto be]securely retained in positiomwh ilen aderemovablefor reacly renewal or repairs when required, and at the sametime not only the cooling pipes, but also the. channeled rails, are,relieved; from undue wear, as the rails'only are Sub ected to the.

v wear of'the narrow rods c thereon.

InFigs/Kflid qI'haveillustrated a modification. of the invention. 'Theconstruction; of the furnace is theisame, asgthat descr bed withreferenceto Figs. 1 andZ. Instead of a r g ng e s' .in'te t e fo m fndle stacks before pushing thesameinto the furnace, I place a pluralityof bars hone beside thegother on a .pair. of supporting rods o,

V thereafter-I place a pair of {supporting rods 6: "on he b rshgamll plae a. Se d lay i f bars it on therolds c and so on, so thata layerstack'ofbars is formed,- Figs. 3a nd 4- showing a' stack' composed ofthree layers of bars. h The supports 0' and bars are pushed hn uel t e.fur ace: iii-thesa-me Way en .ds ribejcl wi h erengete Fi s. 1 an y d psing 11 11 a 's. uitable, d Is-- r V tancesapa rt welding ofthe saidbars. is pre Vented, a he fiemeha awess eallft e ba individually, sothat the efficiency oflt f ur 1 3 211 s j he di b z onwn. in g-i e a s hr e si le l l t ethei ppers.

andsothat'successive layelf ..of"barsrhfcr oss,

0118' a t er w en i lplwiligl e a s o e.

be dispensed with;

ted at." e ffie ency' of he. its-11w" g t ha f ecen emption fv u li srdu. d; d. hat. the operat n, is, very reliable.

'.;1.;I.n1; a." ma als i mate... ol; heating. I

bars, gel ongated heating chamhe termed;

with a hearth and having an intake end remote from said hearth, skidbars 011 the bottom of said chamber and extending from the intake end tothe hearth, said bars having shallow guide channels in their upperfaces, and billet supporting rods guided on said channels andprojec-ting above the same to form-supports, for the billets, and. meansfor pushing 'said'rods through said furnace.

2: A furnace for heating billetscomprising an, elongated heating chamberformed with a hearth and having an intake end at with a hearth andhaving'an intake. end

away fromsaid hearth, the floor of said-cham-' be]: belng provided withupstanding parallel, rlbs, stat onary skidbars mounted between,

said ribs'and heldv from displacement there'- byand provided withshall-ow bhannels in their upper faces, supporting rods guidedinsaidchannels for supportingthe billets to ,be heated, means for}pushing said rods through the furnace, the opposed faces'fof the skid.bars and floor of the f-urnacebeing recessed to, provide. channels, andcoolingpipes enclosed, insaid channel'sfland under lying the skidubars.V I I In testimony whereof Iafiix my signature.

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